ICP 40VA Transformer for WFML070A036A1 — 120/240V to 24V | Ships Today

Overview

This genuine OEM control transformer (part number 1176944) supplies the 24-volt low-voltage power that runs the WFML070A036A1 furnace's control board, gas valve, thermostat circuit, and safety controls. It steps the 120/240V line voltage down to a 24V secondary at 40VA. When a transformer fails — usually from a shorted thermostat wire, a stuck contactor, or simple age — the furnace goes completely dead: no thermostat display, no blower, no ignition sequence. Because the entire control system depends on it, the transformer is one of the most critical low-cost components in the unit.

Specifications

Compatibility

Direct-fit replacement for the ICP/Heil/Tempstar WFML070A036A1 gas furnace and other ICP-family units calling for a 40VA, 120/240V-to-24V control transformer. Verify your primary voltage tap before wiring.

Installation Guide

1. Safety First — Disconnect power at the breaker and verify zero voltage with a multimeter.
2. Access — Remove the furnace control/service panel.
3. Document — Photograph every primary and secondary lead before disconnecting.
4. Remove — Unfasten the mounting screws and disconnect the transformer leads.
5. Install — Mount the new transformer, match the correct primary tap (120V vs 240V), and reconnect the 24V secondary per your photo.
6. Test — Restore power, confirm 24VAC at the secondary, and verify the thermostat and control board power up.

Signs You Need a Replacement

• Furnace is completely unresponsive — no thermostat display
• No 24V reading at the control board or gas valve
• Blown low-voltage fuse that keeps failing
• Burnt smell or visible scorching on the transformer body

Shipping & Returns

Ships same day before 3 PM CST. 30-day returns. Backed by the National HVAC Parts fitment guarantee.